5/5 A tigress must protect her cubs while battling rivals who want to overthrow her.
4/5 A painted wolf matriarch's feud with her daughter threatens to bring the dynasty down.
3/5 The lioness leader of a once mighty pride must now battle for their very survival.
2/5 A colony of emperor penguins in Atka Bay try to keep themselves alive through the winter.
1/5 David, a chimpanzee alpha in Senegal, tries to overcome threats to his leadership.